Carbureter.



CAYBURETEH` APPLlcATIac-a msn mmm, 1915.

Patented lam. 19M.

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return-"rw @me i Vrije c .iiniil i' l Le im,

cesen c. einen, or :amenacenMauritanie.

@ZZ whom it muy concern:

Be it known that CARL C. Timmins, a citizen oi4l the United States of America, and. a resident of Baltimore7 State of Maryianti,

have invented certain new and useful linprovenients in Carbureters9 of which the following is a speciiicotion.

My intention relates to improvements in carhuretcrs, and comprises means for insuring a, more thorough ininture of air and coniloustilole than is produced by present cor bureters, together with better control of the lieu7 of the mixture and the finer atomizetion olf the liquid.

The object of my invention is to provide u more perfect mixture of air and coinbustible., and .a iiner atomization of the conibustilfle, to avoid stratiiication7 avoid de iiection of the mixture 'toward the wells of the engine intake or manirold nassage, to

ohtziiin more effective control. of the 'liow of the mixture and, in' general, to provide more e'liicient carburetor giving higher 'fuel economy anci better engine performance, and

'to .cle this by simple and relatively inminen-A eive ineens. n

will now proceeci to describe my invention with reference to the accompanying `cir-a\vings,` anal will then point out the novel features in Ciainis.

' lu said drawing: Figure shows a cen- 'rai vertical section of one form of my in rovecl combined mixing device anni valve cated in a carburetor of one Well known p Fic. shows a central kverticul section another Well known type of carburetor lLavinio; an alternative 35o in of my improvet'i combined inixingvclevice :incl valve. Fig. 3 shows a fragmentary vertlcal section or the upner portion or a carbureter and lower pornati've forni of my; improved mixing device and Valve. Fig'. i is a 'fragmentary Ver ,al section of one form of device for adjusting; the combined mixing device enti valve.

lt is well known that carbureters of the `present clay Clo not deliver to the engine a perfect mixture o' air, and gasolene or kerosono, a gras, but that the mixture is ',ull of drops of liquid gaeolene or kerosene; one reason being that the so-cailml N auxiliary air 7 is not properly mined with the stream of atoinizecl liquifi and air et and hej/enti the point Where the current oii auxiliary air joins the main or primary stream of air carrying misteri gasolene or .kerosene in suspension.

Specification of Letters Patent. i153@ rvin the ordinary carburetor are, tliereio'e,

' cipal tion of an engine intake, and shows an alternir inlet, 7 the amiliary air Valve.

1915. Serial No. 16,138. i;

.Another reason is that in practice, stratilication occurs, in the carhureter and in the in take pipe of the engine, ton very great e2;- tent. lt is Well known that gases of even slightly different specific gravitics are-very prone to stratification; that it is an e trenicly cliliicuit matter to produce a fairly uniform mixture ol' two gases olf somewhat flili'erent speciic gravities. New the speciiio gravity of gasolene Vapor is much than that of air, and the specific gravity of air with liquid gasolene or kerosene in susu pension is higher than that of gasolcne vapor. rclinarily, the auxiliary air is aclinittccl at the side of the carburetor, and passes up into the engine intake at the sicie of the primary current of oir with misteri igasolene or kerosene in mechanic l. suenen-- sion, and Without proper mixture with such primary current. The conditions sii particularly such favor stratilicaton against thorough mixture; anti 'this teint one;Y to strutilcaticn is further enhanced in the ordinary carbiueter7 by the m'rlinaiv butte fly or throttle Valve, which` commonly. is s placed as to favor passage o'i the ouiniary air p along one side of suoli throttle Valve, and to favor the passage the prinportion of the primary current air gesclene or kerosene in susijiensiou along the other side of such valve.

By the present invention l provide coni hined mixing device and throttle valve, er plicablc to existing cerhureters,v which miic ing device produces a thorough mixture of the euxiiiorjf air with the main or nriniarjv current of mixed air and inistccl kerosene or gasolene, and which also tends to :itemize the coinblstible more iinely5 to (lel'lect the mixture away from the walls of the engine manifold or intake, and thereby to prevent condensation upon the manifold, and which acting a throttle valve, gives a more perfeet control of the flow or' thc mixture thun air passage, of the carburetor', .the spray nozzle the socalled carburetor loowi, fl,- thc jflfoat and 5 the float valve operatori lijf that float. 6 designates the usual auxiliary curi the spring for that valve. 9 rlesi:` throat through which the auxiliary zur the primary air fr.

' nates my improved combined mixing device and throttle valve. In the form shown in Fig. 1 it consists of a light slightly conical spring l1, preferably formed of ligllow or tubular wire, and seated at its upper or larger end against a washer 12 interposed between the carbureter and the engine manifold 13. Within this spring 11 there is a' spider 1li, the legs of which engage the lower end of the spring 11, while at the center said spider is connected to a rod 15 slotted for engagement with the crank pin 16 of an 'eccentric 17 pivoted to the washer 12. Outside of the carbureter a. lever 18 is provided,

whereby the eccentric 17 may be oscillated spider 11i, and

so raising and lowering the so contracting the spring 11 or permitting 'the spring to expand. It will ybe seen that with contraction or compression of the spring l1 the space between successive coils `of this spring will be reduced, and that with expansion of the spring the space between successive coils of the spring will be increased, so that the spring, provided with means for contracting or compressing and eiqianding or elongatiiig it, forms an eilicient throttle valve. Furthermore, this throttle valve is free from the tendency to produce stratification which is characteris-A tic of the ordinary butterfly throttle valve commonly used in carbureters. Such butterily valves are commonly placed at about the point wherethe auxiliary air enters the main air passage, and tend to cause the auxiliary air to pass up on one side or' the butterfly valve, and to cause the primary mixture to pass upon the other side of the butterfly valve. Such stratification if produced, tends to persist clear to the engine cylinder or cylinders, `and 'is a frequent cause of imperfect combustion and of iineven firing in diderent cylinders of a multicylinder engine. as shown, opposite the throat through which the auxiliary air enters the main mixture passage, not only produces no tendency to stratification, but, by causing both the primary niixture and the auxiliary air to tlow through the spaces between the coils of the valve into the interior of the valve, tends to cause very thorough and intimate mixture of the primary and secondary currents, together with a much liner atomization of the combustible than is obtained in ordinary carbureters. Furthermore, the tendency of the valve, arranged as shown, is to direct the mixed current up through the center of the engine intake 13, whereas the ordinary butterfly throttle valve tends to direct the mixture against the Valls of thr engine manifold. The manifold being, usually (particularly when starting) some- What cold, contact of the mixture with this manifold tends to produce condensation, which is to be avoided.`

vthrough the spaces between the ysuccessive vmeans for passing My improved valve, placed 7G The arrangement shown 1n F ig. 2 is substantially the same as that shown in llig. 1, except that the ends of the coil spring 11 are shown connected to the water4 jacket space 19 of the carbureter, W-herebytlieheat-4 75 ed water of this jacket spaye may be y@used to iow through the hollovi1 tube forming the spring 11, such spring there a very etiicient device for heating the mixture of combustible and air passing coils of lthe spring. 1 have illustrated the connection of the hollow tubing` forming the spring to the water jacket space of the carburetei', merely means for supplying heated fluid to such hollow tubing. I may employ any other a heating fluid through the tubing of this spring, or for heating the spring, and do not limitl myself to the particular means shown.

y serving' i as an illustration of', oneri-'8 In the arrangement shown in Fig. 3, the

spring valve, instead of being formed of is formed of a lat ribbon conical helix; numeral 11a hollow tubing, wound into a designating the said helix.

W hat .l claim is:

41. The combination with a carbureter f having communicating passages for primary and auxiliary air respectively, and having means for injecting fuel into the primary air, prior to the entry of the auxiliary `air into, the primary air passage, of a combined mixig device and valve located at the inteisection ofthe primary and auxiliary air passages, and comprising a hollow member hav ing a helical slot through which the vapor and said combined mixing device and valve, and means .for compressing said device axially, or permitting extension of said device axially, at will, and thereby varying the width of such helical slot.

2. The combination with a carbureter having communicating passages for primary and auxiliary air respectively, and having means forv injecting' fuel into the primary air, prior to the entry of the auxiliary air into the primary air fpassage, of a combined mixing device and valve located, in'part at least` at the intersection of the primary and auxiliary air passages, and comprising a' hollow member having a helical slot throughr which the vaporv and aircui'rents may pass intoA the interior of said 4combined mixing device and valve, and means ior compress` ing said device axially, at will, and thereby varying the width of such helical slot.

The combination with a carbureterf having communicating passages for primary air currents may passinto the interior of iso :incassa and auxiliary air respectiyely, and having means for injecting fuel into theprlmary air, prior to the entry of the auxiliary slr section of the primary and auxiliary air passages, and comprising a hollow member -Haring outwardly in the direction of ow, and having a helical slot through which the vapor and air currents may pass' into the interior ot' said combined mixing device and valve, and means for compressing said device axially, or permitting extension of said device axially, at will, and thereby varying the width. ci" such helical slot.A

fi. The combination with a carbureter having communicating passages for primary and auxiliary air respectively, and having means for injecting fuel into the primary air., prior to the entry of the auxiliary air into the primary air passage, 'of a combined mixing device and valve located in part at least at the intersection of the primary and auxiliary air passages, and comprising a. hollow member flaring outwardly in the direction of flow, and having a helical slot through which the vapor and air currents may pass into the linterior of said combined mixing device and valve, and means for compressing said device axially, or permitting extension of said device axially, at will,

and thereby varying the width of such helical slot.

The combination with a carbureter hai-'ing communicating passages for/primary and auxiliary air respectively, and having means for injecting fuel into the primary air, prior to the entry of the auxiliary air -into the primary air passage, of a combined mixing device and valve located at the inter-` section oi' the primary and auxiliary air passages, and comprising 'a helical spring having vbetween successive coils openings through which the vapor and air currents may pass into the interior of said combined ni" device and valve, and means for ipressing said spring axially, or permit- A and thereby varying the width" between the successive coils. f into the primary air passage, of a combined ,c mixing device and valve located at the interting extension of said spring'axjia/llv at'y will,"

of the spaces lill 6. The combination -vvitli -a carbureter having communicating passages for primary and auxiliary air respectively, and having means for injecting fuel into the primary air, prior to the entry of the auxiliary air into the primary air-passage, ci' a combined mixing device and valve located at the intersection of the primary and auxiliary air passages, and comprising a conical helical spring having between successive coils openings through which the vapor and air currents may pass into the interior of said combined mixing device and valve, and means for compressing said spring axially, or permitting extension of said spring axially, at will, and thereby varying the width of the spaces between thevsuccessive coils.

7. The combination with a carbureter. having communicating passages for priir'iary and auxiliary air respectively, and having 7o means for injecting fuel into the primary air, prior to the entry of the auxiliary air into the primary air passage, of a combined mixing device and valve located at the intersection of the primary and auxiliary air'75 passages, and comprising a conical helical spring formed of tubular material having between successive "coils openings through which the vapor and air currents may pass into the interior of said combined mixing 80 device and valve, and means for compressing said spring axially, or permitting extension of said spring axially, at will, and thereby varying the width of the spaces between the successive coils, and means for circulating 85` heated fluid through the coils of said spring. In testimony whereof l have signed this specification in the presence of two subscribN ing witnesses. l Y

"f )ARL C. THOMAS. `Witnessesr MARrM. MAGRAW, HARRIET S. Maenner. 

